Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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    Recovery of nutrients from biogas digestate with biochar and clinoptilolite
    Kocaturk, N.P. - \ 2016
    Wageningen University. Promotor(en): L. Stoumann Jensen; Lijbert Brussaard, co-promotor(en): S. Bruun; Kor Zwart. - Wageningen : Wageningen University - ISBN 9789462578234 - 130
    biochar - clinoptilolite - digestate - nutrients - waste management - fractionation - growth - biochar - clinoptiloliet - digestaat - voedingsstoffen - afvalbeheer - fractionering - groei

    The liquid fraction of digestate contains nutrients which makes it a valuable fertiliser in agricultural crop production systems. However, direct application of digestate may raise practical and environmental problems. Therefore, processes to concentrate nutrients have been proposed aiming not only to treat the liquid fraction of digestate to overcome the problems related to direct application, but also to recover the nutrients of which natural reserves are being depleted such as phosphorus and potassium.

    In this thesis, the focus was on the evaluation of the use of clinoptilolite and biochar for nutrient recovery from the liquid fraction of digestate; and to investigate the further use of these nutrient-enriched materials as fertiliser.

    This thesis showed that sorption with clinoptilolite and biochar can be a promising technology to recover nutrients from liquid fraction of digestate. Using biochar and clinoptilolite provides concentration of nutrients and, thereby, volume reduction which allows for savings on storage, transport and application of the voluminous liquid fraction of digestate. The end-products are digestate-enriched clinoptilolite and enriched biochar can act as N fertilisers.

    Sturen in melkproductie en melksamenstelling : verkennende studie naar de effecten van Clinoptiloliet
    Verwer, C.M. ; Eekeren, N.J.M. van - \ 2011
    [S.l.] : Louis Bolk Instituut (Biogeit rapport / Louis Bolk Instituut 23) - 25 p.
    geitenhouderij - clinoptiloliet - voedertoevoegingen - melkproductie - melksamenstelling - biologische landbouw - goat keeping - clinoptilolite - feed additives - milk production - milk composition - organic farming
    In dit Biogeit rapport wordt een praktijkonderzoek beschreven naar de effecten van Clinoptiloliet op de melkproductie en melksamenstelling van geiten. Voor het onderzoek zijn 50 nieuwmelkte geiten gebruikt. De geiten werden verdeeld over 2 groepen; een controle-groep en een Clinoptiloliet-groep. Clinoptiloliet werd verstrekt nadat alle dieren minimaal 6 weken in lactatie waren. Gedurende 6 maanden zijn om de 6 weken melkmonsters genomen om per individu de melkproductie, vetgehalte en eiwitgehalte te bepalen. Bij de start van het onderzoek en aan het einde van het onderzoek is ook het celgetal per geit bepaald. Clinoptiloliet had geen (neven)effect op de melkproductie en het eiwitgehalte van de melk. Clinoptiloliet had een positief verhogend effect op het vetgehalte van de melk met ongeveer 0.1-0.4 %.
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